From 72469bafa9d81a5578f53ec40175001f4c77cff6 Mon Sep 17 00:00:00 2001 From: dimitri staessens Date: Tue, 5 Jul 2016 16:38:54 +0200 Subject: irmd: Move registry to its own sources All registry functionality has been extracted from the IRMd to improve modularity and legibility of the code. --- src/irmd/registry.c | 593 ++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 593 insertions(+) create mode 100644 src/irmd/registry.c (limited to 'src/irmd/registry.c') diff --git a/src/irmd/registry.c b/src/irmd/registry.c new file mode 100644 index 00000000..063309a4 --- /dev/null +++ b/src/irmd/registry.c @@ -0,0 +1,593 @@ +/* + * Ouroboros - Copyright (C) 2016 + * + * The IPC Resource Manager - Registry + * + * Dimitri Staessens + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +#include "registry.h" + +#include + +#define OUROBOROS_PREFIX "registry" + +#include +#include + +#include +#include +#include +#include + +struct reg_instance * reg_instance_create(pid_t api) +{ + struct reg_instance * i; + i = malloc(sizeof(*i)); + if (i == NULL) + return NULL; + + i->api = api; + i->state = REG_I_WAKE; + + pthread_mutex_init(&i->mutex, NULL); + pthread_cond_init(&i->wakeup, NULL); + + INIT_LIST_HEAD(&i->next); + + return i; +} + +void reg_instance_destroy(struct reg_instance * i) +{ + bool wait = true; + pthread_mutex_lock(&i->mutex); + i->state = REG_I_NULL; + + pthread_cond_broadcast(&i->wakeup); + pthread_mutex_unlock(&i->mutex); + + while (wait) { + pthread_mutex_lock(&i->mutex); + if (pthread_cond_destroy(&i->wakeup)) + pthread_cond_broadcast(&i->wakeup); + else + wait = false; + pthread_mutex_unlock(&i->mutex); + } + + pthread_mutex_destroy(&i->mutex); + + free(i); +} + +void reg_instance_sleep(struct reg_instance * i) +{ + pthread_mutex_lock(&i->mutex); + if (i->state != REG_I_WAKE) { + pthread_mutex_unlock(&i->mutex); + return; + } + + i->state = REG_I_SLEEP; + + pthread_cleanup_push((void(*)(void *)) pthread_mutex_unlock, + (void *) &i->mutex); + + while (i->state == REG_I_SLEEP) + pthread_cond_wait(&i->wakeup, &i->mutex); + + pthread_cleanup_pop(true); +} + +void reg_instance_wake(struct reg_instance * i) +{ + pthread_mutex_lock(&i->mutex); + + if (i->state == REG_I_NULL) { + pthread_mutex_unlock(&i->mutex); + return; + } + + i->state = REG_I_WAKE; + + pthread_cond_signal(&i->wakeup); + pthread_mutex_unlock(&i->mutex); +} + +struct reg_entry * reg_entry_create() +{ + struct reg_entry * e = malloc(sizeof(*e)); + if (e == NULL) + return NULL; + + e->name = NULL; + e->state = REG_NAME_NULL; + e->flags = 0; + + e->req_ae_name = NULL; + e->response = -1; + + return e; +} + +struct reg_entry * reg_entry_init(struct reg_entry * e, + char * name, + char * ap_name, + uint32_t flags) +{ + struct reg_ap_name * n = NULL; + + if (e == NULL || name == NULL || ap_name == NULL) + return NULL; + + n = malloc(sizeof(*n)); + if (n == NULL) + return NULL; + + INIT_LIST_HEAD(&e->next); + INIT_LIST_HEAD(&e->ap_names); + INIT_LIST_HEAD(&e->auto_ap_info); + INIT_LIST_HEAD(&e->ap_instances); + + e->name = name; + e->flags = flags; + n->ap_name = ap_name; + + list_add(&n->next, &e->ap_names); + + if (pthread_cond_init(&e->acc_signal, NULL)) { + free(e); + return NULL; + } + + if (pthread_mutex_init(&e->state_lock, NULL)) { + free(e); + return NULL; + } + + e->state = REG_NAME_IDLE; + + return e; +} + +void reg_entry_destroy(struct reg_entry * e) +{ + struct list_head * pos = NULL; + struct list_head * n = NULL; + + bool wait = true; + + if (e == NULL) + return; + + pthread_mutex_lock(&e->state_lock); + + e->state = REG_NAME_NULL; + + pthread_cond_broadcast(&e->acc_signal); + pthread_mutex_unlock(&e->state_lock); + + while (wait) { + pthread_mutex_lock(&e->state_lock); + if (pthread_cond_destroy(&e->acc_signal)) + pthread_cond_broadcast(&e->acc_signal); + else + wait = false; + pthread_mutex_unlock(&e->state_lock); + } + + pthread_mutex_destroy(&e->state_lock); + + if (e->name != NULL) + free(e->name); + + if (e->req_ae_name != NULL) + free(e->req_ae_name); + + list_for_each_safe(pos, n, &e->ap_instances) { + struct reg_instance * i = + list_entry(pos, struct reg_instance, next); + reg_instance_destroy(i); + } + + list_for_each_safe(pos, n, &e->auto_ap_info) { + struct reg_auto * a = + list_entry(pos, struct reg_auto, next); + + if (a->argv != NULL) { + char ** t = a->argv; + while (*a->argv != NULL) + free(*(a->argv++)); + free(t); + } + + free(a->ap_name); + free(a); + } + + list_for_each_safe(pos, n, &e->ap_names) { + struct reg_ap_name * n = + list_entry(pos, struct reg_ap_name, next); + + free(n->ap_name); + free(n); + } + + free(e); +} + +struct reg_ap_name * reg_entry_get_ap_name(struct reg_entry * e, + char * ap_name) +{ + struct list_head * pos = NULL; + + list_for_each(pos, &e->ap_names) { + struct reg_ap_name * n = + list_entry(pos, struct reg_ap_name, next); + + if (strcmp(ap_name, n->ap_name) == 0) + return n; + } + + return NULL; +} + +struct reg_instance * reg_entry_get_reg_instance(struct reg_entry * e, + pid_t api) +{ + struct list_head * pos = NULL; + + list_for_each(pos, &e->ap_instances) { + struct reg_instance * r = + list_entry(pos, struct reg_instance, next); + + if (r->api == api) + return r; + } + + return NULL; +} + +struct reg_auto * reg_entry_get_reg_auto(struct reg_entry * e, + char * ap_name) +{ + struct list_head * pos = NULL; + + list_for_each(pos, &e->auto_ap_info) { + struct reg_auto * a = + list_entry(pos, struct reg_auto, next); + + if (strcmp(ap_name, a->ap_name) == 0) + return a; + } + + return NULL; +} + +pid_t reg_entry_resolve_api(struct reg_entry * e) +{ + struct list_head * pos = NULL; + + /* FIXME: now just returns the first accepting instance */ + list_for_each(pos, &e->ap_instances) { + struct reg_instance * r = + list_entry(pos, struct reg_instance, next); + return r->api; + } + + return 0; +} + +char ** reg_entry_resolve_auto(struct reg_entry * e) +{ + struct list_head * pos = NULL; + + /* FIXME: now just returns the first accepting instance */ + list_for_each(pos, &e->auto_ap_info) { + struct reg_auto * r = + list_entry(pos, struct reg_auto, next); + return r->argv; + } + + return NULL; +} + +struct reg_entry * registry_get_entry_by_name(struct list_head * registry, + char * name) +{ + struct list_head * pos = NULL; + + list_for_each(pos, registry) { + struct reg_entry * e = + list_entry(pos, struct reg_entry, next); + + if (strcmp(name, e->name) == 0) + return e; + } + + return NULL; +} + +struct reg_entry * registry_get_entry_by_ap_name(struct list_head * registry, + char * ap_name) +{ + struct list_head * pos = NULL; + + list_for_each(pos, registry) { + struct list_head * p = NULL; + struct reg_entry * e = + list_entry(pos, struct reg_entry, next); + + list_for_each(p, &e->ap_names) { + struct reg_ap_name * n = + list_entry(p, struct reg_ap_name, next); + + if (strcmp(n->ap_name, ap_name) == 0) + return e; + } + } + + return NULL; +} + +struct reg_entry * registry_get_entry_by_ap_id(struct list_head * registry, + pid_t api) +{ + struct list_head * pos = NULL; + + list_for_each(pos, registry) { + struct list_head * p = NULL; + struct reg_entry * e = + list_entry(pos, struct reg_entry, next); + + list_for_each(p, &e->ap_instances) { + struct reg_instance * r = + list_entry(p, struct reg_instance, next); + + if (r->api == api) + return e; + } + } + + return NULL; +} + +int registry_add_entry(struct list_head * registry, + char * name, + char * ap_name, + uint16_t flags) +{ + struct reg_entry * e = NULL; + + if (name == NULL || ap_name == NULL) + return -EINVAL; + + e = registry_get_entry_by_name(registry, name); + if (e != NULL) { + LOG_DBG("Name %s already registered.", name); + return -1; + } + + e = reg_entry_create(); + if (e == NULL) { + LOG_DBG("Could not create registry entry."); + return -1; + } + + e = reg_entry_init(e, name, ap_name, flags); + if (e == NULL) { + LOG_DBG("Could not initialize registry entry."); + reg_entry_destroy(e); + return -1; + } + + list_add(&e->next, registry); + + return 0; +} + +int registry_add_ap_auto(struct list_head * registry, + char * name, + char * ap_name, + char ** argv) +{ + struct reg_entry * e; + struct reg_auto * a; + + if (name == NULL || ap_name == NULL) + return -EINVAL; + + e = registry_get_entry_by_name(registry, name); + if (e == NULL) { + LOG_DBG("Name %s not found in registry.", name); + return -1; + } + + if (!(e->flags & BIND_AP_AUTO)) { + LOG_DBG("%s does not allow auto-instantiation.", name); + return -1; + } + + if (!reg_entry_has_ap_name(e, ap_name)) { + LOG_DBG("AP name %s not associated with %s.", ap_name, name); + return -1; + } + + if (e->state == REG_NAME_NULL) { + LOG_DBG("Tried to add instantiation info in NULL state."); + return -1; + } + + a = reg_entry_get_reg_auto(e, ap_name); + if (a != NULL) { + LOG_DBG("Updating auto-instantiation info for %s.", ap_name); + list_del(&a->next); + free(a->ap_name); + if (a->argv != NULL) { + while (*a->argv != NULL) + free(*a->argv++); + } + } else { + a = malloc(sizeof(*a)); + if (a == NULL) + return -1; + } + + a->ap_name = ap_name; + a->argv = argv; + + if (e->state == REG_NAME_IDLE) + e->state = REG_NAME_AUTO_ACCEPT; + + list_add(&a->next, &e->auto_ap_info); + + return 0; +} + + +int registry_remove_ap_auto(struct list_head * registry, + char * name, + char * ap_name) +{ + struct reg_entry * e; + struct reg_auto * a; + + if (name == NULL || ap_name == NULL) + return -EINVAL; + + e = registry_get_entry_by_name(registry, name); + if (e == NULL) { + LOG_DBG("Name %s not found in registry.", name); + return -1; + } + + a = reg_entry_get_reg_auto(e, ap_name); + if (a == NULL) { + LOG_DBG("Auto-instantiation info for %s not found.", ap_name); + return -1; + } + + list_del(&a->next); + + if (e->state == REG_NAME_AUTO_ACCEPT && list_empty(&e->auto_ap_info)) + e->state = REG_NAME_IDLE; + + return 0; +} + + +struct reg_instance * registry_add_ap_instance(struct list_head * registry, + char * name, + pid_t api) +{ + struct reg_entry * e = NULL; + struct reg_instance * i = NULL; + + if (name == NULL || api == 0) + return NULL; + + e = registry_get_entry_by_name(registry, name); + if (e == NULL) { + LOG_DBG("Name %s not found in registry.", name); + return NULL; + } + + if (api == 0) { + LOG_DBG("Invalid api."); + return NULL; + } + + if (reg_entry_has_api(e, api)) { + LOG_DBG("Instance already registered with this name."); + return NULL; + } + + if (e->state == REG_NAME_NULL) { + LOG_DBG("Tried to add instance in NULL state."); + return NULL; + } + + i = reg_instance_create(api); + if (i == NULL) { + LOG_DBG("Failed to create reg_instance"); + return NULL; + } + + if (e->state == REG_NAME_IDLE || e->state == REG_NAME_AUTO_ACCEPT + || e->state == REG_NAME_AUTO_EXEC) { + e->state = REG_NAME_FLOW_ACCEPT; + pthread_cond_signal(&e->acc_signal); + } + + list_add(&i->next, &e->ap_instances); + + return i; +} + +int registry_remove_ap_instance(struct list_head * registry, + char * name, + pid_t api) +{ + struct reg_entry * e = NULL; + struct reg_instance * i = NULL; + + if (name == NULL || api == 0) + return -1; + + e = registry_get_entry_by_name(registry, name); + if (e == NULL) { + LOG_DBG("Name %s is not registered.", name); + return -1; + } + + i = reg_entry_get_reg_instance(e, api); + if (i == NULL) { + LOG_DBG("Instance %d is not accepting flows for %s.", + api, name); + return -1; + } + + list_del(&i->next); + + reg_instance_destroy(i); + + if (list_empty(&e->ap_instances)) { + if ((e->flags & BIND_AP_AUTO) && + !list_empty(&e->auto_ap_info)) + e->state = REG_NAME_AUTO_ACCEPT; + else + e->state = REG_NAME_IDLE; + } else { + e->state = REG_NAME_FLOW_ACCEPT; + } + + return 0; +} + +void registry_del_name(struct list_head * registry, + char * name) +{ + struct reg_entry * e = registry_get_entry_by_name(registry, name); + if (e == NULL) + return; + + list_del(&e->next); + reg_entry_destroy(e); + + return; +} -- cgit v1.2.3